Which position is preferred for evaluating the heart in radiology?

The dorsoventral (DV) position is preferred for evaluating the heart in radiology primarily because it provides a more accurate representation of the heart's size and shape in cases of potential enlargement or other abnormalities. In the DV position, the animal is positioned on its chest with the x-ray beam angled downwards, allowing for a clearer view of the thoracic cavity and reducing the distortion that may occur with other positioning methods. This position minimizes the superimposition of the heart over the spine and other thoracic structures.

Additionally, the DV position enhances the visibility of the pulmonary vessels and surrounding anatomical structures, making it easier for veterinarians or radiologists to assess the cardiothoracic relationship and diagnose conditions such as heart disease or congestive heart failure.